Gasket-shaping device



Aug. 11, 1931. L. A. WESTON ET AL 1,818,180

GASKET SHAPING DEVICE Filed May 22, 1929 INVENTORJSL I [try/i. liszorz,4 BY fall/7640a 0 Zi/ Z /4 35/ i 60-50% 54:51: 7 ATTORNEY.

Patented Aug. 11, 1931 UNETED STATES PATENT OFFECE LEROY A. WESSON ANDLAWRENCE O. WESTON, OF ADAMS, MASSACHUSETTS GASKET-SHAPING DEVICEApplication filed May 22, 1929. Serial No. 365,077.

This invention relates to an apparatus for shaping pipe-joint gasketsfor use in. connection with the maintenance of sewer-gas and watertightjoints between the bell-shaped end and the spigot end of adjacent seweror gas pipes. The gasket, which is formed by the apparatus forming thesubject-matter of this application, is disclosed in our copendingapplication filed May 22, 1929, and bearing Serial No. 365,079, underthe title of Gasket devices.

The primary object of the invention is to provide an apparatus which isdesigned to receive a flat blank of sheet material and shape the sameinto an annular gasket having split finger elements and adapted whenformed to be placed on the spigot end of a pipe and to form on the splitgasket a retaining flange and a yieldable flange for the purpose whichis clearly set forth in the above-mentioned copending application.

Simplicity of construction, convenience of arrangement of parts andcomparative inexpense of manufacture, are further desiderata that havebeen borne in mind in the production and development of this invention.

NVith these and many other objects in View, which will more readilyappear as the nature ofthe invention is better understood, the sameconsists in the novel construction, combination and arrangement of partsshown in the accompanying drawings, in which:

Fig.1 is a perspective view of the driving assembly for driving thevarious movable elements of the apparatus.

Fig. 2 is a sectional view of a pair of slidable tool shaft bearingsemployed in connection with the invention.

V Fig. 3 is aside view of the bearings shown in Fig. 2.

Fig. 4: is a perspective view of the assembled blank retaining guide andthe shaping and stamping mechanism adapted to receive the articles to beshaped and stamped.

Fig. 5 is a fragmentary side view of an additional forming mechanismemployed in connection with the invention.

Fig. 6' is a front elevational view of the .i mechanism shown in Fig. 5.

Fig. 7 is a front view of the flange shaping rolls employed in theapparatus.

Fig. 8 is a perspective view of one of the blanks adapted to be shapedby the appa= ratus. 911

Fig. 9 is a perspective view of the partially coplipleted gasket asshaped by the flanging re s. V

Fig. 10 is a perspective view of the completed article, as shaped by theentire appa? ratus.

In all of the above=mentioned views, like characters of reference areemployed to designate like parts throughout and a baseboard is shown at12. This baseboard is provided as with a pair of guides 14 and 16. Theseguides are adjustable by virtue of the pin and slot connections 18which" permit the guides to be moved to and from each other. The guide16 is grooved, as indicated at 20, in while the other guide is providedwith movable guards 22 for retaining a blank such as is shown at inplace, between the guides.

The-baseboard 12 has a cutout portion 26 therein across which the blank,shown in '1' Fig. 8 at 80, is adapted to pass to have its opposite sidesengaged by the pair of feed rolls '28 and 30. The upper roll 30 hasstamped thereon in reverse relief any suitable inscription, such asPatent pending or so Patented. The blank above referred to and which isshown at 80 in Fig. 8 is formed as an elongated strip of sheet materialhaving securing eyelets 80 and a solid portion 82. One longitudinal edgeof the blank is as previously formed with a succession of lateral slits84, which are adapted to be bent by the apparatus into theform, as shownin Fig, 9, to form the resilient flange 86. Directly behind the rolls 28and 30 are a pair of adjustable guides 33- and 34:, similar to theguides 14 and 16 and in substantial alignment with the same.

A cutaway portion, shownat 36, is provided in the baseboard 12 behindthe guides 33 and 34 and a pair of rollers (clearly shown in Fig. 7) aredisposed so as to receive the stamped metal blank therebetween in thecutout portion 36. These last mentioned rollers are designated at 3.8and 40. These rollers, 38 and 40, have horizontal contacting surfaces 42and 44 and beveled contacting surfaces 46 and i8, respectively, adaptedto receive therebetween that partof the blank which forms the resilientflange to be more fully described hereinafter. The roller 38 is providedwith an annular flat side face 50 and the roller with a flange 52,having a flat inner face 54: that engages the face and receives aportion of the blank therebetween which forms on the blank an innerlateral flange 88, clearly shown in Fig. 9. The blank, as it emergesfrom the forming rolls 38 and 40, will take the form shown in thisfigure.

In order that the blank thus far shaped may be forced into a circularshaped gasket, a pair of adjustable brackets 90 and 92 are mounteddirectly behind the rolls 38 and 40 in any suitable manner and on anysuitable support. These brackets are adjustable by virtue of the pin andslot connections 94 and 96 formed respectively between each bracket andits support. The bracket 92 is provided with a curved cam surface 92while the bracket 90 is provided with a substantially complementarycurved surface 90. The blank, as shaped by the rolls 38 and i0, ispassed between these cam surfaces which engage the solid central portionof the same and impart an even curvature to the blank. As the blankemerges, it assumes the circular form of the fini shed gasket shown inFig. 10.

The actuating machinery for the apparatus is shown in Fig. 1. Thisassembly comprises a drive shaft S having a gear 2 thereon and carryingthe roller 38. This gear 2 meshes with an idler gear 3, suitablysupported, which drives a gear 4 011 a shaft S, which shaft carries thefeed roller 30. The gear 4; meshes with a gear 5 on a shaft S carryingthe feed roller 28.

The shaft S carries a second gear 6 which meshes with a gear 7 on ashaft S carrying the roller 40. Thus it will be seen that the variousshafts and rollers all rotate at the same speed. It, therefore, followsthat the horizontal feeding surfaces of the rollers should have a commonradial distance.

In order that the upper rollers 30 and 40 may have a firm grip on theblanks 80, an adjustable support for the shafts S and S is provided at70. The support is provided with a through bolt 71 to which arevertically and ad ustablvsecured, by means of the nuts 72, a pair ofbearings 73 for the shafts S and S on either side of the support 70. Thesupport is provided with a pair of flanges 74 having adjustable bolts 75threaded therethrough and adapted to bear against the spring 76 on thebearing 78. By screwing down on the adjustable bolt 7 5, any desiredpressure of the rolls 30 and 40 may be imparted to the blank undertreatment. The

rolls 528 and 38 are not adjustable, as their shafts have fixedbearings.

lVhat we claim is:

1. A device for shaping metallic gaskets from flat metal strips,comprising an adjustable guide and movable guards adapted to receive theflatstrip to be shaped, a pair of feed and a pair of strip shaping rollsat the end of the adjustable guide and said guards, adapted to receivethe strip therebetween, said latter rolls each having central contactingflat surfaces of less width than the strip and angular contactingsurfaces on each side of the flat central contacting surfaces to formoppositely located flanges on the flat strip, said contacting surfacesbeing adapted to receive the strip therebetween, means for rotating saidpairs of rolls for feeding the strip therethrough to shape the same, andmeans comprising two adjustable brackets each having a curved surfacethat are spaced from eachother and located adjacent said strip rolls,for imparting a desired curvature to the strip after the same has passedthrough the shaping rolls.

2. A device for shaping metallic gaskets from metal strips, comprising aguide adaptcd to receive the strip to be shaped, a pair of stripshapingrolls adjacent the guide adapted to receive the strip therebetween, saidrolls each having a flat central contacting surface and inclinedcontacting surfaces on one side of each of the central contactingsurfaces, said contacting surfaces being adapted to receive the striptherebetween, means for rotating said rolls for feeding the striptherethrough to shape the same, and adjustable means comprising twobrackets with curved surfaces that are spaced from each other andlocated adjacent said rolls for imparting any desired curvature to thestrip after the same has passed through the strip-shaping rolls, saidbrackets having curved slots to provide means for varying the positionsof the curved surfaces.

3. A device for shaping metallic gaskets from fiat metal strips,comprising a guide adapted to receive the said strip to be shaped. apair of rolls adjacent the guide adapted to receive the striptherebetween, said rolls each having flat central contacting surfacesand inclined contacting surfaces on one side of each of the centralcontacting surfaces to form oppositely located flanges, said contactingsurfaces being adapted to receive the strip therebetween, means forrotating'said rolls for feeding the strip therethrough to shape thesame, and means comprising two members having curved surfaces andlocated adjacent said rolls for imparting a desired curvature to theformed strip to complete the gasket after the same has passed throughthe rolls.

4. A device for shaping metallic gaskets from metal strips, comprising apair of rolls adapted to receive the strip therehetween, said rollshaving centrally disposed contacting surfaces and angular contactingsurfaces on both sides of the central contacting surfaces, saidcontacting surfaces being adapted to receive the strip therebetvveen,means for rotating said rolls for feeding the strip therethrough to formflanges on the opposite edges of the strip, and adjustable means havingtwo spaced curved surfaces adjacent said rolls for imparting any desiredcurvature to the strip after the same has passed through the rolls.

5. A device for shaping metallic gaskets from metallic strips eachhaving one of its edges previously slitted to form fingers, comprising apair of rolls adapted to receive the strip therebetween, said rollshaving central contacting surfaces to receive the unslitted edge andangular contacting surfaces on one side of the central contactingsurfaces to form flanges on the edge of the strip, said contactingsurfaces being adapted to receive the strip therebetween, means forrotating said rolls for feeding the strip therethrough to form saidflanges, and means comprising a curved contracting throat passageadjacent said rolls for imparting a desired curvature to the strip afterthe same has passed through the rolls.

LEROY A. WESTON. LAWRENCE O. WESTON.

